Using two meteor project with docker - ECONNREFUSED 127.0.0.1:8082 - node.js

Question

I know it sounds silly but I have to create two meteor project, one as a "server" on port 8081 and another one as a "client" on port 8080 and run both with docker.
The client must not create a mongodb instance as it should connect to the server's one.
I know that the server will create the mongodb on port 8082 automatically.
Using export MONGO_URL=mongodb://127.0.0.1:8082/meteor works fine when launching everything separately. But when using Docker, it tells me that client can't connect to the mongo on port 8082.
What I want is to be able to connect the client to the mongo on 8082 or to connect both the client and the server on a full mongodb on port 27017.
Here are the files:
Server's DockerFile:
FROM node:10
ENV METEOR_ALLOW_SUPERUSER=true
ENV ROOT_URL="http://localhost:8081"
RUN curl "https://install.meteor.com/" | sh
COPY . /usr/src/server
WORKDIR /usr/src/server
#RUN chmod -R 700 /usr/src/app/.meteor/local
RUN meteor npm install
EXPOSE 8081
CMD ["npm", "start"]
client's DockerFile:
FROM node:10
ENV METEOR_ALLOW_SUPERUSER=true
ENV ROOT_URL="http://localhost:8080"
RUN curl "https://install.meteor.com/" | sh
COPY . /usr/src/client
WORKDIR /usr/src/client
#RUN chmod -R 700 /usr/src/app/.meteor/local
RUN meteor npm install
RUN export MONGO_URL=mongodb://127.0.0.1:8082/meteor
EXPOSE 8080
CMD ["npm", "start"]
Docker-compose.yml :
version: "3.3"
services:
server:
build: ./Server
ports:
- "8081:8081"
command: "meteor run -p 8081"
links:
- database
client:
build: ./Client
ports:
- "8080:8080"
command: "meteor run -p 8080"
environment:
- MONGO_URL=mongodb://localhost:8082/meteor
depends_on:
- server
database:
image: mongo:3.6.4
Here is the error I get :
MongoNetworkError: failed to connect to server [localhost:8082] on first connect [MongoNetworkError: connect ECONNREFUSED 127.0.0.1:8082]
client_1_a42af00d59c0 | W20190311-15:01:13.496(0)? (STDERR) at Pool.<anonymous> (/root/.meteor/packages/npm-mongo/.3.1.1.v3rpzk.m5kk8++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/topologies/server.js:564:11)
client_1_a42af00d59c0 | W20190311-15:01:13.499(0)? (STDERR) at emitOne (events.js:116:13)
client_1_a42af00d59c0 | W20190311-15:01:13.501(0)? (STDERR) at Pool.emit (events.js:211:7)
client_1_a42af00d59c0 | W20190311-15:01:13.502(0)? (STDERR) at Connection.<anonymous> (/root/.meteor/packages/npm-mongo/.3.1.1.v3rpzk.m5kk8++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/pool.js:317:12)
client_1_a42af00d59c0 | W20190311-15:01:13.503(0)? (STDERR) at Object.onceWrapper (events.js:317:30)
client_1_a42af00d59c0 | W20190311-15:01:13.504(0)? (STDERR) at emitTwo (events.js:126:13)
client_1_a42af00d59c0 | W20190311-15:01:13.505(0)? (STDERR) at Connection.emit (events.js:214:7)
client_1_a42af00d59c0 | W20190311-15:01:13.506(0)? (STDERR) at Socket.<anonymous> (/root/.meteor/packages/npm-mongo/.3.1.1.v3rpzk.m5kk8++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/mongodb-core/lib/connection/connection.js:246:50)
client_1_a42af00d59c0 | W20190311-15:01:13.507(0)? (STDERR) at Object.onceWrapper (events.js:315:30)
client_1_a42af00d59c0 | W20190311-15:01:13.508(0)? (STDERR) at emitOne (events.js:116:13)
client_1_a42af00d59c0 | W20190311-15:01:13.509(0)? (STDERR) at Socket.emit (events.js:211:7)
client_1_a42af00d59c0 | W20190311-15:01:13.509(0)? (STDERR) at emitErrorNT (internal/streams/destroy.js:64:8)
client_1_a42af00d59c0 | W20190311-15:01:13.511(0)? (STDERR) at _combinedTickCallback (internal/process/next_tick.js:138:11)
client_1_a42af00d59c0 | W20190311-15:01:13.511(0)? (STDERR) at process._tickDomainCallback (internal/process/next_tick.js:218:9)
Thanks.
EDIT: Alright, thanks for the help but I've managed to do it. Here are the files :
docker-compose.yml
version: "3.3"
services:
client:
build: ./Client
depends_on:
- server
ports:
- "8081:8081"
command: "meteor run -p 8081"
environment:
- MONGO_URL=mongodb://database:27017/meteor
server:
build: ./Server
ports:
- "8080:8080"
command: "meteor run -p 8080"
depends_on:
- api
environment:
- MONGO_URL=mongodb://database:27017/meteor
mobile:
build: ./application
links:
- database
depends_on:
- server
- database
api:
build: ./Client/api
ports:
- "4000:4000"
command: node apiLinks.js 4000 database
links:
- database
depends_on:
- database
database:
image: mongo:3.6.4
Client/Dockerfile
FROM node:10
ENV METEOR_ALLOW_SUPERUSER=true
ENV ROOT_URL="http://localhost:8081"
RUN curl "https://install.meteor.com/" | sh
COPY . /usr/src/client
WORKDIR /usr/src/client
#RUN chmod -R 700 /usr/src/app/.meteor/local
RUN meteor npm install
EXPOSE 8081
CMD ["npm", "start"]
Server/Dockerfile
FROM node:10
ENV METEOR_ALLOW_SUPERUSER=true
ENV ROOT_URL="http://localhost:8080"
RUN curl "https://install.meteor.com/" | sh
COPY . /usr/src/server
WORKDIR /usr/src/server
#RUN chmod -R 700 /usr/src/app/.meteor/local
RUN meteor npm install
EXPOSE 8080
CMD ["npm", "start"]
And in the code I've replaced all the url. For example, instead of http://127.0.0.1:8080 I have now http://server:8080.
You might notice that server is now on port 8080 and client on port 8081. I had to switch them, that was part of the subject which changed later.

Answer 1

A Meteor app does not expose mongodb directly. It's only in development that it starts one for you.
If you want to connect one meteor app to another, you should use DDP.connect with the server's url.
You can then subscribe to data from that server and call meteor methods on that server.